Ammonium ion (nh4+) reacts with nitrite ion (no2–) to yield nitrogen gas and liquid water. The following initial rates of reaction have been measured for the given reactant concentrations.

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

2.a rent payment4.renters insurance5.a security deposit6.utility paymentsare the correct  answers

May strike workers if the load swings, twists, or turns.